<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>登录</title>
</head>
<body>
    <h1>登录</h1>
    <form action="">
        <input type="text" name="username" placeholder="用户名"><br>
        <input type="text" name="password" placeholder="密码"><br>
        <input type="button" value="登录" @click="login()"><br>
        {{info}}
    </form>
<!--引入axios和vue-->
<script src="https://cdn.bootcdn.net/ajax/libs/axios/0.21.1/axios.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script>
<script>
   let v = new Vue({
       el:"form",
       data:{
           info:""
       },
       methods: {
           login:function () {
               let data = new FormData(document.querySelector("form"));
               axios.post("/login",data).then(function (res) {
                   if(res.data==1){
                       location.href="/";
                   }else if(res.data==2){
                       v.info="用户名错误";
                   }else{
                       v.info="密码错误";
                   }
               })
           }
       }
   })


</script>
</body>
</html>